Does Fauna heal?

Pretty straightforward question really: does anyone know if fauna heals over time, to restore damage points it's taken as a result of my injuring it in some way? In other words, if i attack an animal with the Thermoblade, but don't kill it, and leave it alone, then come back at some later time and attack it again, will it have returned to the full health it had before my initial attack?

The leviathans I have killed seem to stay dead . . . not exactly a scientific study, though.

Thanks for the reply...it's not so much respawning I'm interested in, but regeneration of hit-points in a creature over time. For example: if I manage to attack a Ghost Leviathan for a good number of hits with my PRAWN claws, and then escape before it kills me, if return to the same creature on the next in-game day, will it have recovered any (or all) of the damage it took...?

I realise this is a tricky one to answer, since I assume it'd have to go on anecdotal evidence...